Crying Tears of Blood (could be triggering)

I stare across the room at him
Eyes focusing on his neck
On the pale, slightly tanned skin
I can almost hear his heart beating
Pumping every precious drop of blood
Flowing through every vein.

I can see it, picture it
My teeth, sinking, deep
Deep into the flesh of his neck
Bursting every vessel
Blood, spurting over my tongue
The brilliant, cold, metallic taste
Filling my mouth with pleasure.

Then I snap back
Into harsh reality.
Hard stool beneath me,
Pen in hand,
Just another lesson
Just another day
I begin to cry, tears of blood
Staining the cold, white paper
And my cold, white heart.